Single spindle automatic lathe



Feb. 16, 1954 Filed Nov. 5, 1948 c. E. MILLER ,005

SINGLE SPINDLE AUTOMATIC LATHE 12 Sheets-Sheet l glWv/ZZ wf v ww 1954 c. E. MILLER 2,669,005

SINGLE SFINDLE AUTOMATIC LATHE Filed NOV. 5, 1948 12 Sheets-Sheet 2 Feb. 16, 1954 c. E. MILLER SINGLE SPINDLE AUTOMATIC LATHE Filed Nov. 3, 1948 12 Sheets-Sheet 3 Feb. 16, 1954 Q MlLLER SINGLE SPINDLE AUTOMATIC LATHE l2 Sheets-Sheet 4 Filed NOV. 5, 1948 Way i & Qwz "My 1 mmlemlwxmm.

Feb. 16, 1954 c. E. MILLER SINGLE SPINDLE AUTOMATIC LATHE l2 Sheets-Sheet 5 Filed Nov. 5, 1948 OOOOOOOOO Feb. 16, 1954 c. E. MILLER SINGLE SPINDLE AUTOMATIC LATHE l2 Sheets-Sheet 6 Filed Nov. 3, 1948 Feb. 16, 1954 c, MILLER SINGLE SPINDLE AUTOMATIC LA'THE l2 Sheets-Sheet '7 Filed Nov. 5, 1948 C. E. MILLER SINGLE SPINDLE AUTOMATIC LATHE Feb. 16, 1954 12 Sheets-Sheet 8 Filed Nov. 5, 1948 1954 c. E. MILLER SINGLE SPINDLE AUTOMATIC LATHE Filed Nov. 3, 1948 @DQQDQQQQ rid:

1954 c. E. MILLER SINGLE SPINDLE AUTOMATIC LATHE l2 Sheets-$heet 10 Filed Nov. 3, 1948 m M W 1733- E 11554 c. E. MILLER SINGLE SPINDLE AUTOMATIC LATHE 12 Sheets-Sheet 11 Filed NOV. 5, 1948 Q 7 as g RM LVVI Feb. 16, 1954 c.

SINGLE SPINDLE AUTOMATIC LATHE 12 Sheets-Shet 12 Filed Nov. 5. 1948 Patented Feb. 16, 1954 ..SINGLESPINDLE AUTOMATIC LATHE eGarroll iEirMillen Windsor, Vt.,assignor:to :Cone *AutomaticiMaohinc Companyln'c Windsor, :Vt -aoorpnrationmf. Vermont Application November 3, 1948, Serial No. 15.8;'214

' invention "relates "to 'automatio lathes *of the single work spindle type in connectiomwith which there-are a plurality "of tool "holders which are brought 1 into operation --successively, these tool "holders being carried 'loy a turret which is periodically indexed *tobring the holders successively into operative relation to work carried by the work spindle.

"Cine of the objects of this invention'is*-to'provide i*or-selective and easy elimination of operation of tool" hol'derswhere "less-than 'all of "thestationsof the turret .are desired to complete-the tooling operations.

A further 'object is -to*pr0.vide-for varyingthe throw '01 the tool holders without-requiring the substitution of diiferent actuating camsth-ere'for.

' Aiurtheriobj'ect' is to improve the mechanism ior producing'the feed, "both fast or slowworking, and: thefast retractioniof the tool holders.

"Stillanother "object :isto provide S mple means by 'which' one ;or moretools'tmay be .caused to undercut. :and without "requiring special tool attachments for'that purpose. This :object'is attained by causing "the tool :holder turret-to rock during the cutting-operation, .andzthis also makes possible taper cutting of-the work eithenexternaliyor internally.

Further "objects :and -:advantages will 4 :appear from (a description of an embodiment "thereof shown in the accompanying" drawings in which Figure 1 is a longitudinal vertical sectional view through 'the'machine :on line -l--l of Figure2. I

'Fignrez'is aileithand end elevation ofithe machine.

Figure '3 is ..a"fragmentaljy' View "sim'ilarto a portion ofFigurefl, but to.a Ilargerscale andwith partshroken away an'd'in section.

.Eigure '4 is alright hand end elevation of the partsshown 'in"Ei 'ure"3, the cover ibeingtremoved.

1 Figure 5"is 'aldetail sectional :view-on 'line 5 5 ofFigure 4.

Figure "6 'is:a detail sectional .view on 'line6'iifi ofLFigureE .and tofailarger scale ohf1ine6.6 of Figure'l.

".Eiaure 'Hjis ,aldetail sectional view onjline 1-1 offfigure "8.

"ifii llresia andflb are detail sectional views on Tlines la-Jo .and fill- 719 ofIFigure I.

"Figure B is a view to a larger scale of parts shown inFigure 4' atthe 'end' ofan'indexing.

' 'E'igums 9 and-10 "are -views-simi1ar "to Figure 8 but-with parts-ofi-the'indexing and "feed control mechanisms in difierentpositions.

to K5 are *f-ragmentary. sindselovational 'howing certain indexing-sandman- .trol=partssiii. iaerentwositions 'Figure 16 is-"an exploded *perspective' *view*- of the"to01 carrying {turret and actuating *medhanismfor-thetoolslides.

Figures 1'7,- '21, 24, 27 and BU'are top plan-views of the-indexingplate on the-tool slide in-various adjustedpositions.

"Figures 18"to'-20, 22 -an'd"23, 25 and"26,"'-28-and 29, 3.1 and .32, respectively, aref-ragmentary side elevations of "the actuating cam with actuating elementspositionedto correspond withthe'positions of the indexingplate'inthe-next previously numbered figuresjfor definite lengths offeed.

Figure 33 is a fragmentary developed' peripheral view of the cam'actuating drum 'withrzcarm followers secured thereto.

Figures '34 to "'37, inclusive, are diagrammatic views of the tool .ieedmechanism showing the relative extents of fast and slow feed ,for' .one angular adjustmento'f the modifying block.

Figures. '38 and .39 are diagrammatic .viewssimilar to Eigures "3'5 and 3.7, respectively, i but showing a different angularcadjustmentofithe moditying block.

Figures AOand I41 are .viewssimilar ltolFigures 35 and .317, respectively, buttshowing the'efierit-fif a .third difierent.angularhadjustmentof thelnoiiiiyingymember.

,Figure A2-is a .viewwsimilar .tofli urefifl and in dotted ,lines similar to "figure-.41, but showing the effects of .a =dilierent adjustmentof .theecam follower in :the cam actuating-mechanism.

tAs bestshown in Figures ;1,,2and 3 ,lthe\machine comprises a bed -I having at oppositeiends the verticallyiextending .columns 2 ,and 3 ;j0i118d atitheir upperiends-Joyahorizontal casin ill, this casing containing, extending longitudinally thereof, ,-a controlling cam :shaftj. lI-he :column 2 g-hasrrjournaled for v rotation therein: a =worksoarryingaspindlezcfira awonky piece :1 beingsshown oar ried therapy :in Figure 1Beneath-the 'MOY-K spindle; :and extending through theispace' b tween the: columnsrfi;sandetlandsinto cachet-these columns, is :a :shaft to which carries irtnereon :a toolecarryingiturreti I' I [As shown chest "Figures -36 xandfilfi, this inalcarrying turret I I is polygonal a'in outline,1having fire :sides, on teach 10f :which :may bexmounteil a tool -:s1i,de t5. :One.ofithesersIides,iasrshown in Ei ure 1,, :may carry-1a drill or iother'ttool shownat 'l fiiandrtheseveral toolsmiayrbezbronght successively into :operative relation to Work 'lrby. indexingtthe turret -l I about the-axis .oftthe shaft l 0. The camshaft: 5 which controls :many of the operations of the machine "is :rotatedaby any suitable :meansxtas :shown; such :means compxisingsaawormmheeljfl carriedzby the camshaft 51cm zdrivenrbr ifi *mrm "zzon :arcross eamrshait zdrirenzat airelatinelysi'tast idle speed and at a relatively slow working speed, the working speed being effective during the time that any one of the tools is operating upon the work carried by the spindle. Details of mechanism for so driving the cam shaft may be as shown in my United States Letters Patent No. 2,506,515 granted May 2, 1950, for Automatic Lathe or Screw Machine. Means for feeding a work piece through the spindle 5, including a feed cam 23 carried by the shaft 5, and other cams 24, 25, and a series of cams on an elongated cam drum 25 carried by the shaft 5 may also be employed for controlling various operations of the machine in accordance with usual practice.

This invention is concerned primarily with the actuation and control of the tools carried by the turret and the indexing of the turret.

The indexing of the turret is produced by retation of the cam shaft 5 through a Geneva wheel 30 having five Geneva slots 3! corresponding to the five faces of the turret, this Geneva wheel being turned intermittently by the action of the Geneva arm 32 keyed to a jack shaft 33 positioned beneath the cam shaft 5 and journaled in the end walls of the column 3. The Geneva wheel 3i is secured to a quill 34- journaled on the shaft l and having at one end a bearing flange 35 (see Figure 3) journaled in the inner wall 36 of the column 3. The opposite end of the quill 315 has a bearing flange member 31' journaled in the outer wall 38 of the column 3. The inner bearing flange 35 is secured to the outer end of the turret II as by screws 39. The shaft 33 is driven at intervals by power, this being accomplished through a worm wheel 40 secured thereto and with which cooperates a worm 4! on a horizontal shaft 42. This horizontal shaft 42 may be ro tated by power through a clutch at 43, which when closed, couples to the shaft 42 a sprocket wheel 44 about which passes a drive chain 55 passing about a drive sprocket wheel 46 fixed to the shaft 41 of a motor 48 (see Figure 6).

The shaft 42 at its other end is connected through a similar clutch 50 to a normally sta tionary drum The drum 5| has a worm 52 with which meshes a worm wheel 53 on a shaft 54. The stop 55 is carried by this worm wheel 53 which normally engages one side of the worm 52, thus locking the worm wheel against motion in normal driving direction so that the clutch 50 acts as a brake to stop the rotation of the shaft 42 when the clutch 50 is closed. It does not, however, prevent reverse rotation applied to the outer end of the polygonal extension of the drum 5! to which the normally disconnected hand wheel 56 may be applied, reverse rotation of this drum retracting the stop 55. Such retraction moves a limit switch-actuated wedge 57 out of a notch in a disk 58 carried by the shaft 54, making it impossible to start the machine by power until the drum 5| has been returned to braking angular position. This arrangement is similar to that shown in my Patent No. 2,506,515 granted May 2, 1950.

The means for actuating the clutches 43 and 50 is, however, quite different in the present application. The two clutches t3 and 5 are shown as connected by a drag bar 6!) which has lugs 59 which engage the lower forked extremities BI and 62 of a pair of bell crank levers 63 and 64. The adjacent ends of these bell crank levers 63 and 64 have follower rolls 65 and 66, respectively, positioned to be engaged by a cam 70 carried by a rock shaft H, there being five of these rock shafts H spaced angularly around the axis, of the shaft I0 and parallel therewith, one

' for each of the indexed positions of the turret,

and each being journaled through the flange 31 and the Geneva wheel 30. The indexing control is thus effected through mechanism specific for each indexed position or station of the turret. Each of these shafts H carries a dog 12, the dogs of the several shafts being offset axially so that each one lies in the plane of a corresponding lobe 73 on a ring 14, which may be clamped in adjusted angular position to the outer face of a hub or drum [5 journaled on the shaft 33 and driven independently of the shaft 53 by chain and sprocket drive from the main cam shaft 5. Each of the rings 14 is formed split, the two split ends being adapted to be brought toward each other to clamp the ring in adjusted position by tightening a bolt 16 extending through one of the end portions and threaded into the other, as shown best in Figure 8.

Each of the five rock shafts H has keyed thereto a hub 58 carrying a dog Bi] and all of these dogs 65 are in the plane of a cam ii! on the indexing arm 32 carried on the jack shaft 33. On the outer end of each rock shaft H is a crank arm 85 provided with a pin 85 connected by a spring 8'! to a pin 83 on a bracket 89 secured to the outer face of the Geneva wheel 30 and in which the outer end of th corresponding rock shaft H is journaled. Each crank arm 85 has a pair of flat sides, either of which may be pulled toward a flat face 90 on the bracket 59 depending upon the angular relation of the crank arm 85, When one of the shafts 'H is turned to the angular position shown in Figure 15 with the crank arm 85 thrown to the left of center, the dogs 12 and 35 and the cam l0 are in the inoperative position shown and they are ineffective upon the indexing mechanism. In the position of the shaft ll shown in Figures 4, 7, 8 and 11 to 14, inclusive, with a crank arm 85 to the right of center, the corresponding shaft H is in operative angular position.

In the position of the parts before an indexing action is to take place, the cam follower 66 is elevated and the follower 55 is depressed in the position shown in Figures 711 and 12 and the cam TI] on the rock shaft H, which is then immediately below the jack shaft 33, extends vertically as shown. A low portion 82 of the cam 5! engages the dog 85, as shown in Figures 7a and 12. The shaft 42 is thus disconnected from the motor drive, the clutch 43 being open and the clutch 5!! closed. As the control shaft 5 continues to rotate, which also rotates the drum l5, this rotation being new in the slow speed angular portion, the lobe 73 which happens to be in the plane of the dog 72 of the shaft H which is in uppermost position, contacts this dog 12 and rocks it to the left, which, in turn, rocks the cam 75 into the left dotted line position shown in Figure lb. The inclined upper end of the cam ll} then presses the cam follower 65 upwardly and allows the follower 66 to drop as in Figure 13, this shifting the drag bar 55 to the right and closing the clutch 43, which starts the rotation of the shaft 52 by the action of the motor 43. The rotation of the jack shaft 33 is thus begun. This causes the indexing arm 32 to start its rotation from the position shown in Figure 13. At the time its follower is in position to enter one of the Geneva slots 3i at Figure 9, the indexing action commences, turning the Geneva wheel and the turret by one-fifth of a rotation. Before the indexing action has commenced, however, the high portion of the cam 81 engages the-dog 85 and holds the rock shaft iaiitraosammsnom in iiearhanataotrea-lims .iniffiaureswm and"7;b,;andvh1:riaure:ii a ainst theaaet onmfztheespring 81zwhichrtends to throw thermal: z-shaft .EI ltrinzt-the --:opposite :directioniha-ck to-thozlilght h ndztciotted line::position zen-Figure and thisrshafta'lI ;;is-stillin-tthis-:angmarzpositionwhen: itzis;movedxoutnfrom:heneath 1711936331). roll gllnre l0) .iby'the indexing motionzof'fthe Geneva: wheel: anditnrretnwhich::carries it: ontrof operative nositiom-andzbrings' the: next; rock shaft II into position. This succeeding rock shaft,..bemg freeitov'heiacted:upon; by. itsspring 'Bil hast-the ri h 'handsside' ofzits armf 12 inzengasementzmth thetaceesll and its ram inftheirigh-tihand iiotted position ofiFigure w7:b vand in Figure 211. Whenrthef'low iporti-on r8 2 i of :the roam 1:8 I zcomes into position tonenaage "the" dog 80 :0f this; next mckshaft r H it rocks it to therfull line: position of ure 7a. This brings .the cam 511% to the 1ull-;1i-ne posit-ion of-gEigure Ibrwhichflifts thefol lowersr llifitwandrs op thevrotation "of the i k shafit. Tillie-Geneva arm :is rthen in the :a'n olar position .:of F,ig11 re :12 "and the jack n-shaftaris idle g ntila-the nextlobe I;3 ome into actionztozrock thes haft :1 I :fu-rth-er zoounterolockwise and start the rnext indexing 7301710151. Durin thisrrotation of ,theinontrol shaft :5 andithepower rotation of the jack 1 shaft .3 'certain idle :movements :of :a toohearrier onzthevturretareralsoieflectedias will late appear- The-:tool oarry ngi'turretibetweenindexing moitionsz'is locked in position; but means-may: betprovided by wh-ichthe looking means is actuated to roebthe tturret about its-indexing axis. during: the operation .of tools: carried by the turret on work oarried-;1loy I the spindle. The locking means, as shown, eomprises ;a lever IIJO having a locking fin er r110 I pivoted: to its lower end and slidable over-the pivotallt' mounted block: I 0 II and which may be :engaged in any :one 2 of 15, series of lock plates: I112 carried by the Geneva wheel, each havingga recess w H13-in "its outer edge for; the ;-reception :of the locking:finger. The loweriendofthe leveril-flfl is-forkedand engages-a stationary guide fin .-.LIlI2. Thisdockina-leverxlflll is shownias fulcrumedvatits upper-end as-a-t-IM and intermediate its ends :it is l provided '-with a .:lateral {BX- tension I05 carrying a cam follower r011 I06 which maybe engaged by a cam l'flToarried by the Geneva arm -32 'tojbe; pressed tot-.the right; as viewed-zin-Figures -e, 8, '9 and -10, .-aga-inst1-the action of a multipl leatspring A08, to retract the locking finger -I 0 I- from one of the -;-r.ecesses-- 10.3 int-the .Genevarwheel. flhisleauses'thelock.- toabe released for the indexingoperation, atrthaend of which time the cam 1-.01 leaves a the follower IilBzand allows ,thedockingfinger; I0 I to be sprung into-thenext-reeess I R3, of the lockingt late which comes; Opposite thereto. The; loekis-shown released positionin'Figure 10. 7 .ns hefore noted-means isgprovided :forrnoving thellocking device Whileit isin eneagementwith the turret to thereby rock the turret durin ;a tooling operation. By doing this, undercutting of, thezworklmayi beaecomplished; since this moves the tool laterally with re pectttozthe work; {As shown-best in Figures;-51and;.1Q,;the:'fiulcrum404 for-the locking :lever we is :mounted for =vertical motion-on a slide I II! which is mountedbetween vertical guide-members I-Il. The upper' end of the lever I01) islforked-,-.;as=-shown best in :Figiirefi.

- and on the fulcrum pin I04 :between the forks atmpirotzl lizard having zitsimpwardiy aextenfiittgrarm providedrwithramam follower-iron. I IIiin .thespathoofimotionxn azeam 1 E8 on :a :cam. Jdrum M94 carriedziati the end or thershaitn. iwhell'lthis eaml' lt8s-rocksatherloell crank lover .I [5. to; liftlits arm i.l'l 4,. it lifts-;the.leverrtfl'newiththe locking finger It! I awhilelitz :isgin; locking: engagement with the Genevazwheelewhioh thus facts torocklthe Genevazwheel. ,'AiSGBOHd. acam "(not shown) :on the: eametirum '1?! I19 imay betemployed to vreturn the *iulcrumzof z-the iindex-ing arm ;:to its normal Position. ZIhezlower ilimitrof motion of athe. slide -III 2 ;-iS.-;defined :by ;a 51301) 'ISCIBW I20 carriedby a lugfzslzi seoured'to ,thezmachine ("frame as :by a threadedishankiandear nntrat 4.22 (seaFigurerS) ZIlhi's stopascrew ".1525: determines then'ormal lock- L HgJQ-HEEUIQJI IJDOSifiOHiljfithe turret, and whereino nriderouttingwis :desired, it defines the locked angular positions" of? the :turret at: its. various i stations. ifiesides nontrollingrthe indexing "of the turret, the; shaft 33ralsozrhaslaniimportantffunction with relationto the;- motions-of the tools on'thervarious tool 'oaiY-Iiers. vReferring :particularly "to Figures 1,1 3, 'nanu .3i4 to A2, it-wvill 'hetnoted .that this liao'ktshait 3:3:has ancarn 1 tee Ifixedzto rotate therewithzandrprovided with a peripheral-acamigroove tBI therein. This cam r groove has a portion at the-{right which isxperpendicular'to theshaft 33 anrlialsolhasqazportionitoitheil'eft which communioates 1 with thesright khan'd end :portion through the'l-incl-i-nedi portions/I532: and: I 33. Riding in this cam ggroove v I:3.I .yis at f0liower1ll35 carried by a slide 153.6. villhisrelide :is amounted aon suitable ways extending lengthwise :ofrthe machine so as to move-parallel: to ith'eiaxis of the control shaft 5 and t-a-lsoz' -to the jack shaft 33; On this s'lide'l36 a lever I38 is fulcrumed atlrifl. "Theupperend of this lever isl-rconnected through :an adjustable pivoted links-Morton :se'con'd 21s1ide I'M which'is mounted --;to;slide-v on ;a stationary r guidebar I 42 and WhiChfhflSlfiifOWIdlY extendingfork M3 in sliding v -guided relation :to the :control shaft "5 tseemarticularly Figures Stand 16). This slide MI is :provided :with ra "sloping segmental cam face AM adapted to Abe contacted at suitable timesby cam-followers suchas I45 which are selectively :positionable :around the periphery of aadrum :I46akeyed-zto the control shaft 5. The right -.hand limiting=position forthe slide MI is determined byrcontact ofxthis slide with asuitable stop abutment l'tfl. 'The left hand' limit of slidin g motion: is determined 'by a roll I49 projecting from-the-gperiphery :of'the drum M6 at one por tion of .its iperiphery (see :Figures 18,19,33, 34, and: 35) o.

;The;=lowerzendiofithe lever I38 has a follower roll sH'ID whichmayiengagewithin a notch I'5I anymfflfithe slides @152. mounted for'axial sliding motion: paralleltoztheaxis of the shaft II! and arran ed; angularly "spaced around the periphery ofethezturret. The-forward limit of motion of each *slidezmayube :determined "by stop nuts I53 ('Figure'i ):onthreaded-rods It' l. *Sinceas shown, the aurrett'vhasrfive indexin positions or stations, provision for -mounting 'i'ive slides I52 equally angularly spaced around the periphery of the tunet but as will later more fully appear suchzslidesamay :he remitted from one or more of these positions whenthe'tooling does not require therentirerfivetoibetused.

When theJsIi'des'I -EZ are in fullyretracted positionsflithe JSlOtS'FI'B'I "therein are so positioned .lengthwiseltofthei'turret thattheymay be brought 'seriailyxmtorcoonerative relation Ito the cam-roll I50 whenever this cam roll I50 is in its fully retracted position. When it is in such position the slide I4I is at its right hand limit of motion up against the stop as shown in Figure 34 and the cam follower I35 is in the right hand portion of the cam groove I3I. This is the position of these parts when indexin is occurring.

After the indexing has been completed and while the jack shaft 33 is still being rotated, the cam I38 is rotated to a position to move the fulcrum I35 to the left into its left hand portion I32 in fast speed. This brings the tool slide I forwardly in fast speed until the tool carried thereby, as will later appear, approaches contact with the work, this being the position in Figures 35, 38, 40 and 42. This brings the slide I4I with the edge cam I44 to the left into contact with one of the followers I45 on the drum I lii. The motion of the jack shaft 53 stops in this angular position of the cam I38. As the contro1 shaft 5 now turns at low speed the operative follower roll I45 then acting upon the edge cam Ii -l, forces the slide I4I to the right and moves the slide I52 further to the left, this efieoting the slow feed of the tool into the work. This takes place until this feed action is at an end when the follower I45 reaches about the high point of the cam edge I44, whereupon the succeeding lobe I3 contacts and rocks the dOg E2 of the shaft II then in operating position, and starts the rotation of the jack shaft 33. As soon as this occurs the cam I36 rotates to move the follower I35 to the right, withdrawing the tool at fast speed and also pulling the slide I4I back against the stop in position for the indexing to occur, whereupon the succeeding tool slide I52 will be brought into cooperative relation to the cam roll Isl} at the lower end of the lever I38.

Means are provided by which the relative extents of fast and slow feed of the tools may be adjusted independently, and as shown, this means comprises the selective positioning of the followers I45 in the drum I46 and also adjustments at the tool slides themselves, as will now be pointed out. The angular position of the cam roll I45 on its drum with which the cam face I44 contacts when this contact is made, determines how much of the length of this cam face will be effective in moving the slide HM and consequently in swinging the lever 83% to produce the feed motion of the tool. For example, if the slide I iI is moved forwardly toward the drum I46 when the follower I45 which will contact the cam face I44 is toward the upper portion of this cam, substantially the entire length of the cam face 44 is effective in producing the feed motion of the slide MI and consequently the feed motion imparted to the lever I38. If, however, when the slide I II starts its forward movement, the cam follower I45 with which it will contact is nearer its lower limit of motion as th drum I46 revolves, a smaller length of the cam face I44 will be traversed by this cam follower and consequently a small amount of the movement of the slide I4I will occur with a consequent smaller amount of swinging motion imparted to the lever I33.

For the purpose of providing for various adjustments of the effective cam roll I45, the drum I45 is shown as provided with a series of holes I60 which are provided for selective reception of the pivot elements I5! on which the follower rolls I 45 are journaled, a suitable washer I62 and a nut I63 threaded on the inner end of the shank I6I being employed to secure the-cam 01- lower roll I45 in position. It will also be noted that due to the angular spacing of the various lobes l3 corresponding to the various indexed positions or stations of the turret, the forward motion of the slide I i-I is started at different angular positions of the control shaft 5 for the several index stations, and consequently it is possible to employ a different follower roll I45 for each of these stations, only one of these rolls being effective at one time against the cam face Each of the slides I52 is connected to its respective tool carrier by a similar mechanism. The forward ends of each of the slides I52 is forked at I15 and between the forks is pivoted on a vertical pivot I75, a bar Ill. The forward end of the bar II'I is provided on its lower face with a cam follower roll I13 which rides in an angle slot H9 in a guide plate I82) secured to a side face of the turret. This slot I'Iil from its rear end extends forwardly and to the left for substantially half its length and then it turns to the right for the remainder of its length. Thus the cam roll H8 as it passes lengthwise of this slot is caused to move first to the left and then to the right as it is moved inwardly by inward sliding of its slide I52. On its upper face, it carries, pivoted on a pivot I82, a slide block I83, and this slide block slidably engages in a groove i841 cut across the lower face of a disk I85. This disk I85 is journaled in a cylindrical bearing I39 which extends upwardly from a slide I (see Figure 16) which has downwardly extending side flanges ISI provided with outwardly extended feet I92 slidabl' guided beneath guide strips I93 overlying side guides IQ I to which the strips I93 are secured. The forward end of the slide is may be secured as by screws I95 to the rear end of a tool holder slide I5. This tool holder slide I5, as shown in Figure 1, is provided with grooves 2c! in its side edges for the reception of guide and retaining strips 22 which are secured as by screws to the faces of the turret II. Each slide I5 is also provided with a longitudinally extending T slot in its upper face at 2% to facilitate the attachment'thereto of a tool holder such as the tool holder 2&6 of Figure l carrying the drill I6.

The disk I85 which is journaled in the casing Ills is angularly adjustable in order to vary the angle of inclination of the slot IM to the perpendicular to the direction of motion of the slides I99 and I5. To this end the upper portion of the disk I85 may be provided with a worm portion are with which meshes a worm 2 car" ried by a horizontal shaft M2 provided with a knurled head 2I3 at its outer end by which it may be turned. This shaft 2I2 is suitably journaled in a portion 2M of the casing I89 and is held in position by a cap 2 I 5 secured as by screws ZIE. By turning the knurled head 243 it will be evident that the disk I85 may be angularly adjusted.

The casing its has secured to its upper face a ring 220 having a lateral extension 22! provided with an index mark 222. The disk I85 has a central hub portion 223 which extends through the ring 22% and to the top of this extension is secured as by screws 224, a circular cap having a downwardly tapered flange 225 overlying the ring 220 and provided with index markings cooperating with the mark 222 on the extension 22L For any given throw of the lever I38, the angular adjustment of the disk 2I'0 determines the extent or'them'astiedproduced b y tiie rotettion' of the cam 130i andtheslow-feecf-broduced there after: by' the rocking of the lever" -I 38- through the action of a; follower -I 45*on "the race cam" I44 The' efiects of this" angu-l'alr' adjustment of" the" disk =2I 0* for one position of f an actuating cam follower r011 I45- f orone' of the indexing sttions is -'shown'- diagrammatioall'vin Figures '34--to 4'1,-

inclusive: Figures 34--to -37-show successive pos'itions of the tool-*movirig -partswhere the" I 85 isturnedcounterclockwise fi'om'theposition where thef-slot I 84* lies-transverse to the 'lin'e ofmotionof the tool slide by arsmail angler means for-adjustir1g-t1fe throwofat toot slide by the angular adjustment" of a di i -pro is-moved from its-=fu11y"-= retraotedfipositibn in- Figure 34 to the position in Figure 35 where the cam -ftce M4 01 the slide IH contacts-With one of- 5 thefoll'ower rolls" l li on the 'cam drum "I it:

The vfollower r011" l I8-"-f611ows the inclined groove I195 and the slide-blckfl BS-WhioH engQgeS-iri the slot l 84 travels to the- 1'eft -irI-' the slot I M of the disk I 85, 128 shown; While the disk-itself is -b eii'1'g moved; forward from th'e reawenfii'of 'the' slot I'1-'9-"s1-i'ghtI-ymoretharr haif wayR' Sifioethe' shde block I 83 has moved to therightintiie slov I 6 5; the-distancethat the disk -l 85;"'2tmi= 'con'sequen'ti'ythetool sli'de has moved f'c irwareifi iis somewhat less than it I would have b'eeit hhd the siot IM been exactly transverse" to the (i-ire'otiom 0 tier! -of 5 the tool slide The total-Edward 'rriovement ofthe tool s1ideis' -then represented bvthe length and misrepresents the length (st res-t feed-bf the tool towttrci the warm-unfit the '0 tatidmof 'the cam I 30? 'lhe ftil'rumflfi'iof e lever I 38 now remains hired? the new I 33 'hhvin'g now--- st0pped 'it srotation, "and furtheWforwa'rd movement of -the' tool:'slitl is'predated-by*the action of the cam follower-- I lli agaifist the-edge cam I445 The amount -"of' thiS mcitfdfi is howti by mcomparison of Figure 35" with Fiures 36*211 37FFigure-37 showing tife oonop'letion" of' the-fed ing action where "the followerr011 Mii is' or'r' the high point of the cam- -I"'alce-= [Siand Fi'gui' e" 38 showing awn-intermediate positi'oni- D'u'ri g th motion, the disk I85, "and 'corresponding1 t etoobslide, has been'mov'ed forwardlir the distance" shown in Figure 37'} this being slightlys ionger than would have been the casehad the -lslotfil 84 beerr' arranged: transverse to th' since it hes-now com'e baok 'to its deposition: fmm it's righthand positron I Ei giZIe85L- The positions showii in 'Eigures 35 and 3 7 mayo now be com'pared withzzthe positidns showmin FiguresBananas9;iizi whichalatterv:figuresmheidishi I85 has been adjusted with its -'s1'ot +84 eimetlw transverse to the lihe 'oi feed o'f thetoohsozthat no- 'efiebt' of the slot 'l84 isproddoed oii tl-ie fe'ec i which'is entirel-y prodiiee'd bythtemount-of $61" warrrmotidmofthe follower I'FSF v 7 It be noted thb;t"'th'e"'hig h spewstioke' of Figures 38 and'39 less tlifiin'the Tdis ttt'fiiie" of Figures 35 f'to 3'1 and the low soieedz'trazver L" is 'gneate'r thaZnWLi lfihow the Elisk 185166: tar-ted ne of -"motion:

0145-1 is brought oppositeto the arrow" 361 as that this distance 4.5 is in the row marked III. Another follower roll HIS-2 is then secured to the drum I46 opposite the arrow 304 as shown in Figure 22, this being the position for the second station. The drum 146 is then turned backwardly until the roll 145-2 for the second station is opposite to the arrow 391 as shown in Figure 23. Assuming that for the third station a slow feed of 1.2 inches is'desired, its disk 225 (Figure 24) is turned to present 1.2 opposite to the index mark 222 and it will be noted that this distance 1.2 is in the row II. With the follower roll for the second station still opposite to the arrow 30!, a follower roll HIE-3 for station 3 is fixed opposite to the index mark 393 as shown in Figure 25, and the drum I46 is then turned backwardly until this follower i i53 for the third station is opposite to the arrow 30L Assuming that at the fourth station a slow feed of 2.7 inches is desired, the disk 225 for the fourth station (Figure 2'?) is turned to bring the indication 2.7 opposite to the index point 222 and with the follower M5 for the third station still opposite to the arrow 3!. Another follower I454 for the fourth station is fixed opposite to the arrow 304 corresponding to the III column where the distance 2.? occurs, this being as shown in Figure 28. The cam drum M6 is then further moved backwardly until the cam roll 145-4 for the fourth station is opposite to the arrow 36!, as shown in Figure 29. Assuming at the fifth station the slow feed desired is .6, the disk 225 at the fifth station (Figure 30) is turned to bring this distance opposite to the index 222 and while the cam roll 245-4 for the fourth station is opposite to the arrow 39!, the fifth follower roll [45-5 is positioned opposite to the arrow 362 corresponding to the I row in which the distance .6 is found on the fifth station disk 225. The five cam follower rolls M5 are now arranged so that when the machine is in operation, the slow feed of the tools at the several stations will correspond with the desired distances.

The positions of these cam rolls M5 having thus been determined, the angular positions of the lobes 13 for the various stations are so adjusted that the indexing is started at the completion of the slow feed of each, and the rings 14 are then fixed in adjusted positions.

Figure 33 shows the positions of the five follower rolls I45 in a development of the cam drum I46. So long as any of these cam followers M5 are in operative relation, the cam drum MB is being turned at its low working speed. It is turned at its fast speed for the operation of stock feeding and other mechanisms for which fast rotation is desirable during the remainder of its angular extent, such fast speed being as shown, for example, in my Patent No. 2,506,515, tovwhich reference has already been made, but as the mechanisms for producing these other functions form no part of the present invention they are not further disclosed herein.

From the foregoing description of an embodiment of this invention, it should be evident to those skilled in the art that various changes and modifications might be made without departing from its spirit or scope.

I claim:

1. A machine of the class described, comprising a rotary work-carrying spindle, an indexing tool-carrying turret provided with a plurality of tool supports at different angular positions arranged for successive presentation into an operative index position with relation to work carried by said spindle, means for indexing said turret, means for starting said indexing means, mechanism movable with said turret for stopping the indexing means when the corresponding index station has been reached and said indexing mechanism has completed its cycle of operations, means for locking said turret in indexed position, and means actuated by said indexing means for actuating said locking means to unlock said turret in advance of each indexing.

2. A machine of the class described, comprising a rotary work-carrying spindle, an indexing tool-carrying turret provided with a plurality of tool supports at different angular positions arranged for successive presentation into an operative index position with relation to work carried by said spindle, means for indexing said turret, means for starting said indexing means, mechanism independent for each index position for stopping the indexing means when the corresponding index station has been reached and said indexing mechanism has completed its cycle of operations, means for locking said turret in indexed position, andmeans actuated by said indexing means for actuating said locking means to unlock said turret in advance of each index- 3. A machine of the class described, comprising a rotary work-carrying spindle, an indexing tool-carrying turret provided with a plurality of tool supports at different angular positions arranged for successive presentation into an operative index position with relation to work carried by said spindle, means for indexing said turret, means for starting said indexing means, mechanism movable with said turret for stopping the indexing means when the corresponding index station has been reached and said indexing mechanism has completed its cycle of operations, said mechanism having means actuable to render inoperative said indexing stopping means thereby to permit indexing to continue to a succeeding station, means for locking said turret in indexed position, and means actuated by said indexing means for actuating said locking means to unlock said turret in advance of each indexing.

4. A machine of the class described, comprising a rotary work-carrying spindle, an indexing tool-carrying turret provided with a plurality of tool supports at different angular positions arranged for successive presentation into an operative index position with relation to work carried by said spindle, means for indexing said turret, means for starting said indexing means, mechanism independent for each index position for stopping the indexing means when the corresponding index station has been reached and said indexing mechanism has completed its cycle of operations, said mechanism having means actuable to render inoperative said indexing stopping means thereby to permit indexing to continue to a succeeding station, means for locking said turret in indexed position, and means actuated by said indexing means for actuating said locking means to unlock said turret in advance of each indexing.

5. A machine of the class described, comprising a rotary work spindle, an indexing tool-carrying turret provided with a plurality of tool supports at different angular positions arranged for successive presentation into an operative index position of said turret with relation to work on said spindle, means for indexing said turret, a rotary shaft, means for operatively connecting and disconnecting said indexing means and said sliaEG' and means: driven by said shaft roe. con-'- trolling said connectingiand disconnecting means including mechanism individual to' each index position successively interposed in said means, each of said mechanisms"- including a member movable between anoperative positionand an inoperative position in which its mechanism-"is inoperativeto disconnect said index-i-ng means-from said: rotary shaftto thereby cause the indexing action to continue to asubsequent station;

6. A. machine of the: class described", comprising'' a rotary work spindle;- an indexing tool-carrying turret provided withla plurality ofz'tool'rsupportsv at different. angular positionsaarranged. for successive presentation into; an. operative: index position of saidv turret withy relationtor-work on said. spindle; means; for-indexing saiditurret, a rotary shaft, means;- for operativelyr' connecting andidisconnectingsaid indexing meansand said shaft, and: means driven by' said shaft for, con.- trolling' said connecting and;disconnecting'means including mechanism: individualv to each index position successively interposedin said means, each, of said mechanisms includingav member rockabl-y mounted and. adjustable-between. two angular positions one of which is an; operative position and. the other: of which is an. inoperative position in which its mechanism is inoperative to disconnect said. indexi-ng;:means from said rota'ryshaft to thereby cause. the indexing: action to, continue to a subsequent. station.

'7. A machine of the classdescribed, comprising-a rotary'work spindle; anindexingatool-carry ing? turret provided witlr. a. plurality of tool sup? ports:- at d-iiierentangular; positions: arranged. for successive presentation into. an: operative index position of. said; turret with relation towork on said; spindle, means-forindexing .sai'd turret, arotary shaft, means for operatively. connecting, and disconnectingv said indexing; means and said shaft mea-ns driven; by saidishaft for'contnolling said connectingand disconnecting meansincluding mechanism individuala. to each. index-position successively interposed ins-said means, each; of said; mechanisms including a; member) movable between an operative position andgan' inoperative position in. which its: mechanism; is" inoperative to disconnect said; indexingmea-nsfromisaid rotarnshafttothereby'causethe; indexing action -to continue to; a subsequent-station,-means for looking said turret inindexedpositiom,andmeans-am mated-by said indexing meansfor'actuating: said locking: means: to unlock; said; turret. in 3 advance of;- each indexing.

8=- A, machine of? the class-, described, comprisiing agrotary workspindlei, an indexingtool-carrye ing turret provided with: a pluralitypof tool-sup;- ponts at diiferent angular positionsarranged for successive presentation intoz-an'operative: index position of said turret with'relation; to work on said spindle, meansfor in'dexingsaid turret, a rotary; shaft, means-for; operatively connecting and disconnecting said.:indexing.- means and: said shaft, vmeans: driven by'saidashaftfor controlling said connecting and; disconnecting-J means including mechanism individual to each. index position SHQQBSSWGIY; interposed in. said; means, each of said mechanismsincluding: a member rockab'ly mounted and adjustable-between two angular positions;- 01.18% 1": wh-icheis an. operative position anditheother; of which. is: an inoperative position inv which. its mechanism:- isa-inoper ativez to -disconneat said indexing means from said rotary shaft to thereby. causevthecindexing,iactiomtoi continue tdarsubsequenm station, im'eans'zforlflockiifg said f4 turret-in: indexed: position; means actuated by said-indexing means fon' actuating said 103m? ing means tounl'oclci saidl turret in-.tadvancev ct each indexin'g 9. A- machine-- of the class described; comprise ing: a rotary work spindle, "an. indexingto'ol-ecarrw ing turret provided with-5a plurality oft tool s-up ports at diiferentangular positions: arranged for successive presentation into an. i operative; index position of said turret with relationtto work; on said spindle, means for indexing. said.:.tunretiqa rotary shaft; means i for: operatively: connecting and disconnecting said indexing mean'siandisaid shaft, means driven by. saidtshafit for controliine' said connecting and disconn'e'ctingr means including a rock shaft; for: each station: carriedrtdabfe indexed with said: turret.forsuccessiveeintmposiwtionin said control means, meansrnormally/biasing each of saidrockishafts": to; one angular pjOSi'r tion, .means individual for eachrindexedzzposition for rocking the rock, shaftz then interposedifrom said biased positionto. actuate:saidconnecting and. disconnecting. means. to i connect; said.- index: ing means to index'said: turret; andsmeansrholdr ing. said; connecting.- and: disconnecting; means in connected position untiltthe"completionof-an inr dexing action and the intenpositionzof-faisucceeds ing. rock shaft into said: ccnnectingaandzdiscone necting means andto thenicausezsaidi succeedin rock shaft to disconnectsaidi indexlinemechw nisrn.

10. A machine of. theclass;descnibedtcomprisr ing a rotary work: spindle; annindexing tool.- carrying. turret provided. withz'a; plurality oh tooi supports at different angular;positionsearranged for successive presentation, intoaani-onerativez index' position of said turret: with relation; to; work on said spindle, means fonindexingz said'turretn rotary shaft, means for. operativelv connecting and disconnecting: said indexing;meanseand-ysaid shaft, means driven by; said shaft forcontroll. ing said. connecting and; disconnecting-means including arock shaft-for; eachistation carried to be indexed with said turret for' successive-interrposition in said control means;.means normally biasing. each of'said rock shafts toyeithen of two positions, means individual .fort each indexed position for rocking the rock shaftv then interposed fromone of said biased,positionsztoactuate said connecting and disconnecting. means to connect said indexing means to-index, said; turret, means holdingsaid connecting; and disconnecting means in connected Y position; until the completion of an indexingaction-and the interposition-:,0f: a succeeding rock shaft into said connecting; and disconnecting means; and tothen causesaid: sue:- ceeding roclr shaft to disconnect; said; indexing mechanism, and meansfor; rockingeach .of:"said rock shafts to the other angularypositionsto which itis biased by saoli. biasing means; ineffective: to disconnect said indexing.means'whereby: said: in: dexingmeans continues toioperatea ll. A machine of the classdeseribedcomprising arot'ary work. spindle, anIindexing-toor-carrying. turret mounted on an axiszsubstantially paral lel to that of. said spindleiands carrying. aaplu rality of tools at. dififeren't angular positions brought successively into; 'op'era-tivez relation to work on said spindle by: indexingamotioncofsaid turret, a rotary control shaft, means for 'rotating said control shaft; a jack1shaft,-: an indexing Geneva arm carried by 'saidfjackishafmla Geneva Wheel rotatable With said turretiand withl'which saidGeneva arm cooperatesstoiindeinsaid turret,

aircclc shaftcarriedi byiIsaid turreti icr eacli indexed position, a drum coaxial with said jack shaft and rotated from said control shaft, lugs carried by said drum in different axial positions therealong, one of said lugs corresponding to each indexed position, the turret rock shaft for the corresponding index position having a dog lying in the plane of motion of said lug, means including a clutch for driving said jack shaft when said clutch is closed, a brake for said Jack shaft for stopping its rotation, means actuable to open said brake and close said clutch or to open said clutch and apply said brake, a cam movable with said indexing arm and engaging said actuable means to hold said clutch closed while said arm is indexing until said arm has completed a complete indexing revolution, means for operating the operative rock shaft then in position to actuate said actuable means to open said clutch and stop the rotation of said jack shaft when said cam reaches a fully indexed position, and means actuable to turn any selected rock shaft with its dog into inoperative position to permit said indexing arm to be rotated through a succeeding indexing rotation without being stopped.

12. In combination, a rotary work spindle, a tool carrier, a rotary shaft, a member carried by said shaft spaced from its axis, a member mounted for motion parallel to the axis of said shaft, one of said members being a cam and the other of said members being a follower for said cam, means actuable to move said second mentioned member toward said shaft-carried member to a predetermined position relative thereto, whereby said second mentioned member may be forced from said shaft-carried member by the rotation of said shaft, means causing said forced motion of said second mentioned member to move said tool carrier toward work carried by said spindle, and means for returning said second mentioned member to starting position and to withdraw said tool carrier, the timing of the angular position of said shaft and the movement of said second mentioned member being adjustable to thereby determine the extent of cam face engaged by said follower and effective to move said tool carrier toward the work, and means for producing such adjustment.

13. In combination, a rotary work spindle, a tool carrier, a rotary shaft, a member carried by said shaft spaced from its axis, a member mounted for motion parallel to the axis of said shaft, one

of said members being a cam and the other of said members being a follower for said cam, means actuable to move said second mentioned member toward said shaft-carried member to a predetermined position relative thereto, whereby said second mentioned member may be forced from said shaft-carried member by the rotation of said shaft, means causing said forced motion of said second mentioned member to move said tool carrier toward work carried by said spindle, and means for returning said second mentioned member to starting position and to withdraw said tool carrier, said shaft-carried member being securable to said shaft in any of a plurality of positions angularly spaced about the axis of said shaft to thereby selectively determine the extent of cam face engaged by said follower and effective to move said tool carrier toward the work.

14. In combination, a rotary work spindle, a tool carrier, a rotary shaft, a cam follower carried by said shaft spaced from its axis, an edge cam mounted for motion parallel to the axis of said shaft, means actuable to move said cam toward said follower to a predetermined position relative to said follower where said follower may engage said cam face and force said edge cam in the opposite direction, means cifective to cause said forced motion of said cam to move said tool carrier toward work carried by said spindle, means for returning said cam to starting position and for withdrawing said tool carrier, the timing of the angular position of said shaft and the movement of saidcam to said predetermined position being adjustable to thereby determine the extent of cam face engaged by said follower and effective to move said tool carrier toward the work, and means for producing such adjustment.

15. In combination, a rotary work spindle, a tool carrier, a rotary shaft, a cam follower carried by said shaft spaced from its axis, an edge cam mounted for motion parallel to the axis of said shaft, means actuable to move said cam toward said follower to a predetermined position relative to said follower where said follower may engage said cam face and force said edge cam in the opposite direction, means effective to cause said forced motion of said cam to move said tool carrier toward work carried by said spindle, and means for returning said cam to starting position and for withdrawing said tool carrier, said shaft having means for securing said cam follower thereto selectively in any of a plurality of positions spaced angularly about its axis to thereby determine the extent of cam face engaged by said follower and effective to move said tool carrier toward the work.

16. In combination, a rotary work spindle, a tool carrier turret having a plurality of tool carriers arranged in spaced angular relation to be brought successively into operative angular positions by indem'ng of said turret, a rotary shaft arranged parallel to said work spindle, a drum fixed to said shaft, a cam follower carried by said drum, a segmental edge cam having a cam face with which said follower may engage and mounted for motion parallel to said shaft axis, a stop limiting the extent of withdrawal of said cam away from said drum, a lever having a fulcrum transverse to said axis and mounted for limited motion parallel to said axis, one arm of said lever engaging said cam to be moved by said cam and another arm in operative relation to that tool carrier in operative angular position at any time, means for rotating said shaft once for each index position of said turret, means for moving said fulcrum to a forward position to bring said cam away from said stop into position to be contacted by said follower during a portion of the rotation of said shaft for said lever to be rocked in direction to feed that tool carrier in operative angular position toward the work, and to move said fulcrum to a rearward position to retract said cam against said stop and to retract said tool carrier, and means to index said turret While said tool carrier is retracted, said fulcrum moving means having control mechanism independently adjustable for each indexed position of said turret and determining the angular position of said shaft at which said forward motion of said fulcrum begins.

17. In combination, a rotary work spindle, a tool carrier turret having a plurality of tool carriers arranged in spaced angular relation to be brought successively into operative angular positions by indexing of said turret, a rotary shaft arranged parallel to said work spindle, a drum fixed to said shaft, a cam follower carried by said drum, a segmental edge cam having a cam face with whichsaid follower may engage and mount- 

